70 Bulletin Vanderhilt Marine Museum, Vol. V 



little brooks, Natal Bay, South Africa. Durban Bay, South Africa," 

 (Stebbing) ; Natal, (Krauss). 



Material examined: Three large males, taken at Tara Bay, 

 Huahino, Society Islands, south Pacific Ocean, August 19, 1931. An- 

 other large male, taken at Venus Point Reef, Tahiti, Society Islands, 

 August 15, 1931. Two medium size females, one of which is oviger- 

 ous, Bima Village, Sumbawa Islands, Dutch East Indies, October 23, 

 1931. One medium size female, Georgetown, Penang, Malay Straits, 

 Nov. 13, 1931. Another female, slightly smaller, from the same local- 

 ity. Two small specimens, Surabaya, Java, October 28, 1931, (male 

 and female). Two small males from the same locality. One large 

 male, Tara Bay, Society Islands, August 19, 1932. Another small 

 male from the same locality, August 19, 1931. Another large male 

 from the same locality, August 19, 1931. Another large male, taken 

 at Venus Point Reef, Tahiti, Society Islands. One male, medium size, 

 Georgetown, Penang, Malay Straits, November 13, 1931. Another 

 medium size male, from the same locality, November 11, 1931. One 

 male and one female, Noumea, New Caledonia, September 19, 1931. 



Remarks: This is the large edible crab of Asia and Oceania. 



Adult male : Carapace averaging between two-thirds and three- 

 fourths as long as wide, moderately convex, regions scarcely delin- 

 eated, except the paired depressions of the urogastric region. Sur- 

 face smooth, except for a light granular ridge on each branchial re- 

 gion, extending obliquely inward from the ninth lateral tooth. There 

 is also a light, granular arc with its ends directed forward, on the 

 mesogastric region. This arc may be nearly obsolete on large old 

 specimens. The frontal region, including the preorbital teeth, is 

 scarcely one-fourth as wide as the greatest width of the carapace and 

 is cut into four stout, subequal, triangular teeth, in addition to the 

 two, similar, but a trifle blunter, upper, preorbital teeth. The lower 

 preorbital tooth is quite prominent in a dorsal view of the crab, sit- 

 uated below and beyond the upper orbital tooth and extending farther 

 forward than any of the upper orbital teeth. The upper orbital mar- 

 gin is cleft by two, conspicuous, nearly closed sutures. The antero- 

 lateral margin is oblique, widely curved, about a third longer than the 

 postlateral margins, and including the postorbital tooth is cut into 

 nine approximately equal stout, triangular teeth, each of which has 

 the tip directed obliquely forward; the spaces between the teeth are 

 widely excavate. The shorter posterolateral margins are confluent 

 with the posterior border, forming a curve, and slightly thickened in 



